Fix mainnet values on fuji and chiado and remove oasis network (#979)

contract_manager/store/chains/EvmChain/chiado.yaml

@@ -1,6 +1,6 @@
 id: chiado
 wormholeChainName: gnosis
-mainnet: true
+mainnet: false
 rpcUrl: https://rpc.chiadochain.net
 networkId: 10200
 type: EvmChain

contract_manager/store/chains/EvmChain/fuji.yaml

@@ -1,6 +1,6 @@
 id: fuji
 wormholeChainName: avalanche
-mainnet: true
+mainnet: false
 rpcUrl: https://api.avax-test.network/ext/bc/C/rpc
 networkId: 43113
 type: EvmChain

contract_manager/store/chains/EvmChain/oasis.yaml

@@ -1,6 +0,0 @@
-id: oasis
-wormholeChainName: oasis
-mainnet: true
-rpcUrl: https://emerald.oasis.dev/
-networkId: 42262
-type: EvmChain

target_chains/ethereum/contracts/truffle-config.js

@@ -91,12 +91,6 @@ module.exports = {
       provider: payerProvider(`https://api.avax-test.network/ext/bc/C/rpc`),
       network_id: "43113",
     },
-    oasis: {
-      provider: payerProvider(`https://emerald.oasis.dev/`),
-      network_id: 42262,
-      gas: 4465030,
-      gasPrice: 30000000000,
-    },
     aurora: {
       provider: payerProvider(`https://mainnet.aurora.dev`),
       network_id: 0x4e454152,